Flux vs Supabase

TL;DR

Supabase and Flux aren’t really competing for the same job. Supabase gives you Postgres, auth, storage, and realtime — a database-first backend platform with an incredible developer experience. Flux gives you the SaaS platform layer on top: auth built for B2B, billing entitlements, feature flags, observability, secrets, and jobs. Many teams use both.

Feature Comparison

Feature	Supabase	Flux
PostgreSQL database	✅ Core feature	❌ Bring your own
File storage	✅ Yes	❌ Bring your own
Realtime subscriptions	✅ Yes	❌ No
Authentication	✅ Good (consumer-focused)	✅ B2B-focused
SSO (SAML, OIDC)	⚠️ Limited	✅ Yes
SCIM provisioning	❌ No	✅ Yes
Multi-tenancy / Organizations	⚠️ Weak	✅ Deep support
Feature flags	❌ No	✅ Built in
Billing + entitlements	❌ No	✅ Built in
Observability	⚠️ Basic	✅ Automatic
Audit logging	❌ No	✅ Automatic
API key management	❌ No	✅ Built in
Rate limiting	❌ No	✅ Built in
Secrets management	❌ No	✅ Built in
Open source	✅ Yes	❌ No

What Makes Flux Different

Supabase is genuinely excellent at what it does. The developer experience is polished, the open-source community is thriving, and getting a full backend running in minutes is a real value. For consumer apps, personal projects, or teams that want tight control over their data layer, Supabase is a compelling choice.

But Supabase auth was designed with consumer use cases in mind. Adding enterprise customers means bolting on SSO, SCIM, and proper organization management — none of which Supabase handles natively. Multi-tenancy is something you architect yourself on top of Postgres row-level security, which works but requires careful design and ongoing maintenance.

Flux takes the opposite starting point: the entire platform assumes you’re building multi-tenant B2B SaaS. Auth, billing, flags, and observability all share the same tenant model from day one. SSO, SCIM, and audit logs aren’t add-ons — they’re included.

The Complementary Stack

This comparison is different from the others on this page. You can use Flux and Supabase together. Supabase handles your Postgres database and file storage; Flux handles your auth, billing, flags, and observability. Many teams do exactly this. The two platforms don’t overlap in meaningful ways, and each does its job well.

When Supabase is the Better Choice

Supabase is likely the better fit when:

You need a managed Postgres database with a great DX and direct SQL access
You’re building a consumer app where Supabase’s auth is a natural fit
You want an open-source stack you can self-host or fully understand
File storage and realtime subscriptions are core to your product

When Flux is the Better Choice

Flux is the right call when:

You’re building B2B SaaS and need SSO, SCIM, and real organization support
You need auth, billing, and feature flags to work together without glue code
Enterprise customers are asking about audit logs, compliance, and single sign-on
You want a SaaS platform layer that grows with your go-to-market motion, not just your data model

Two Different Layers

The cleanest way to think about it: Supabase is your data layer; Flux is your SaaS layer. Supabase stores and queries your application data. Flux handles who can access your app, what they’re entitled to, and how your product behaves across plans and tenants. If you need both — and most B2B SaaS products do — using them together is a reasonable architecture.